90697081694 has 16 divisors (see below), whose sum is σ = 145262063232. Its totient is φ = 42368099928.

The previous prime is 90697081691. The next prime is 90697081697. The reversal of 90697081694 is 49618079609.

It is an interprime number because it is at equal distance from previous prime (90697081691) and next prime (90697081697).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90697081691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22924484 + ... + 22928439.

It is an arithmetic number, because the mean of its divisors is an integer number (9078878952).

Almost surely, 2^90697081694 is an apocalyptic number.

90697081694 is a deficient number, since it is larger than the sum of its proper divisors (54564981538).

90697081694 is a wasteful number, since it uses less digits than its factorization.

90697081694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45852991.

The product of its (nonzero) digits is 5878656, while the sum is 59.

The spelling of 90697081694 in words is "ninety billion, six hundred ninety-seven million, eighty-one thousand, six hundred ninety-four".